do i need the sel24?

planning to upgrade my 5N to an a6 and also get a 1670. I shoot mostly landscape, street, architecture.

I also have the 1018, 1855, 1650. I use the 1650 or 1855 as my general purpose lens but that will change with the 1670 which will stay on the camera.

wondering if the fast prime would be more useful at night or? over the 1670. I have seen some good night shots with the 1670 and it has oss . wondering if somebody has both and when/how they use the 24.

planning to go to europe and will take the 1018 and 1670. not sure if i need any other lens